Azeotrope-like compositions of dichloropentafluoropropane, methanol and a hydrocarbon containing six carbon atoms

Abstract

Novel azeotrope-like compositions comprising dichloropentafluoropropane, methanol, and a hydrocarbon containing six carbon atoms which are useful in a variety of industrial cleaning applications including cold cleaning and defluxing of printed circuit boards.

What is claimed is: 
     
       1. Azeotrope-like compositions consisting essentially of from about 68 to about 96.9 weight percent 1,1-dichloro-2,2,3,3,3-pentafluoropropane, from about 3 to about 24 weight percent methanol and from about 0.1 to about 8 weight percent cyclohexane and boil at about 45.7° C. at 760 mm Hg; or from about 63 to about 94 weight percent 1,3-dichloro-1,1,2,2,3-pentafluoropropane, from about 4 to about 22 weight percent methanol and from about 2 to about 15 weight percent cyclohexane and boil at about 48.3° C. at 760 mm Hg; or from about 62 to about 93.5 weight percent 1,1-dichloro-2,2,3,3,3-pentafluoropropane, from about 3 to about 20 weight percent methanol and from about 3.5 to about 18 weight percent n-hexane and boil at about 45.2° C. at 760 mm Hg. 
     
     
       2. The azeotrope-like compositions of claim 1 wherein said compositions of 1,1-dichloro-2,2,3,3,3-pentafluoropropane, methanol and cyclohexane boil at about 45.7° C. ±1.0° C. at 760 mm Hg. 
     
     
       3. The azeotrope-like compositions of claim 1 wherein said compositions of 1,1-dichloro-2,2,3,3,3-pentafluoropropane, methanol and cyclohexane boil at about 45.7° C. ±0.7° C. at 760 mm Hg. 
     
     
       4. The azeotrope-like compositions of claim 1 wherein said compositions of 1,1-dichloro-2,2,3,3,3-pentafluoropropane, methanol and cyclohexane boil at about 45.7° C. ±0.5° C. at 760 mm Hg. 
     
     
       5. The azeotrope-like compositions of claim 1 wherein said compositions consist essentially of from about 73 to about 96.9 weight percent 1,1-dichloro-2,2,3,3,3-pentafluoropropane, from about 3 to about 20 weight percent methanol and from about 0.1 to about 7 weight percent cyclohexane. 
     
     
       6. The azeotrope-like compositions of claim 5 wherein said compositions consist essentially of from about 88 to about 95.9 weight percent 1,1-dichloro-2,2,3,3,3-pentafluoropropane, from about 4 to about 8 weight percent methanol and from about 0.1 to about 4 weight percent cyclohexane. 
     
     
       7. The azeotrope-like compositions of claim 6 wherein said compositions consist essentially of from about 88.5 to about 95.4 weight percent 1,1-dichloro-2,2,3,3,3-pentafluoropropane, from about 4.5 to about 8 weight percent methanol and from about 0.1 to about 3.5 weight percent cyclohexane. 
     
     
       8. The azeotrope-like compositions of claim 1 wherein said compositions of 1,3-dichloro-1,1,2,2,3,-pentafluoropropane, methanol and cyclohexane boil at about 48.3° C. ±1.0° C. at 760 mm Hg. 
     
     
       9. The azeotrope-like compositions of claim 1 wherein said compositions of 1,3-dichloro-1,1,2,2,3,-pentafluoropropane, methanol and cyclohexane boil at about 48.3° C. ±0.7° C. at 760 mm Hg. 
     
     
       10. The azeotrope-like compositions of claim 1 wherein said compositions of 1,3-dichloro-1,1,2,2,3,-pentafluoropropane, methanol and cyclohexane boil at about 48.3° C. ±0.5° C. at 760 mm Hg. 
     
     
       11. The azeotrope-like compositions of claim 1 wherein said compositions consist essentially of from about 80 to about 91 weight percent 1,3-dichloro-1,1,2,2,3-pentafluoropropane, from about 5 to about 10 weight percent methanol and from about 4 to about 10 weight percent cyclohexane. 
     
     
       12. The azeotrope-like compositions of claim 1 wherein said compositions of 1,1-dichloro-2,2,3,3,3-pentafluoropropane, methanol and cyclohexane boil at about 45.2° C. ±1.0° C. at 760 mm Hg. 
     
     
       13. The azeotrope-like compositions of claim 1 wherein said compositions of 1,1-dichloro-2,2,3,3,3-pentafluoropropane, methanol and cyclohexane boil at about 45.2° C. ±0.6° C. at 760 mm Hg. 
     
     
       14. The azeotrope-like compositions of claim 1 wherein said compositions consist essentially of from about 80.5 to about 92 weight percent 1,1-dichloro-2,2,3,3,3-pentafluoropropane, from about 3.5 to about 9 weight percent methanol and from about 4.5 to about 10.5 weight percent n-hexane. 
     
     
       15. The azeotrope-like compositions of claim 14 wherein said compositions consist essentially of from about 82 to about 92 weight percent 1,1-dichloro-2,2,3,3,3-pentafluoropropane, from about 3.5 to about 8 weight percent methanol and from about 4.5 to about 10 weight percent n-hexane. 
     
     
       16. The azeotrope-like compositions of claim 1 wherein an effective amount of an inhibitor is present in said composition to accomplish at least one of the following functions: to inhibit decomposition of the compositions, react with undesirable decomposition products of the compositions and prevent corrosion of metal surfaces. 
     
     
       17. The azeotrope-like compositions of claim 6 wherein an effective amount of an inhibitor is present in said composition to accomplish at least one of the following functions: to inhibit decomposition of the compositions, react with undesirable decomposition products of the compositions and prevent corrosion of metal surfaces. 
     
     
       18. The azeotrope-like compositions of claim 11 wherein an effective amount of an inhibitor is present in said composition to accomplish at least one of the following functions: to inhibit decomposition of the compositions, react with undesirable decomposition products of the compositions and prevent corrosion of metal surfaces. 
     
     
       19. The azeotrope-like compositions of claim 14 wherein an effective amount of an inhibitor is present in said composition to accomplish at least one of the following functions: to inhibit decomposition of the compositions, react with undesirable decomposition products of the compositions and prevent corrosion of metal surfaces. 
     
     
       20. The azeotrope-like compositions of claim 16 wherein said inhibitor is selected from the group consisting of epoxy compounds, nitroalkanes, ethers, acetals, ketals, ketones, tertiary amyl alcohol, esters, and amines. 
     
     
       21. The azeotrope-like compositions of claim 17 wherein said inhibitor is selected from the group consisting of epoxy compounds, nitroalkanes, ethers, acetals, ketals, ketones, tertiary amyl alcohol, esters, and amines. 
     
     
       22. The azeotrope-like compositions of claim 18 wherein said inhibitor is selected from the group consisting of epoxy compounds, nitroalkanes, ethers, acetals, ketals, ketones, tertiary amyl alcohol, esters, and amines. 
     
     
       23. The azeotrope-like compositions of claim 19 wherein said inhibitor is selected from the group consisting of epoxy compounds, nitroalkanes, ethers, acetals, ketals, ketones, tertiary amyl alcohol, esters, and amines. 
     
     
       24. A method of cleaning a solid surface comprising treating said surface with an azeotrope-like composition of claim 1. 
     
     
       25. A method of cleaning a solid surface comprising treating said surface with an azeotrope-like composition of claim 6. 
     
     
       26. A method of cleaning a solid surface comprising treating said surface with an azeotrope-like composition of claim 11. 
     
     
       27. A method of cleaning a solid surface comprising treating said surface with an azeotrope-like composition of claim 14.